Room-Temperature Magnetic Refrigerate System Gadolinium-Terbium-Neodynium
2001 Volume 42 Issue 12 Pages 2622-2624
Details
2001 Volume 42 Issue 12 Pages 2622-2624
A system of magnetic materials suited for a room temperature magneto-refrigeration, Gd–Tb–Nd, has been investigated. Samples were melted in an argon-protected high-frequency magnetic induction furnace. Magnetization curves were measured with a vibrating-sample magnetometer, in order to obtain the magnetic entropy change. Experimental results show that the Curie temperature (Tc) of the present system is near room temperature and decreases as the Tb and Nd contents increase. By addition of a small amount of Nd, the magnetic entropy change is comparable with that of Gd–Tb, and the transition temperature changes greatly. Therefore Nd can be used as a working temperature regulator. The Gd–Tb–Nd system is a prospect for realizing a large-scale room-temperature refrigeration in low magnetic fields.
